Modified to run under Lispworks, which unfortunately already had a package...
Modified to run under Lispworks, which unfortunately already had a package (nick)named RT. Changed the regression test package to be REGRESSION-TEST, and make the RT nickname be available only with #-lispworks. Removed a bunch of gratuitous use-package forms. Added lispworks binary filenames to .cvsignore and make clean. Added a test to MAKE-SYMBOL that illustrates a place where Lispworks is noncomplant (this is related to the failure on MAKE-SYMBOL.ERROR.8)